Sydney’s control tower is under scrutiny, and the numbers are not flattering

Sydney Airport has a habit of reminding Australia that scale is not the same as resilience. Four safety incidents in July and August have now pushed staffing levels, fatigue risks and the way air traffic control is organised at the airport to the centre of an investigation by the Australian Transport Safety Bureau.

Preliminary reports released by ATSB chief commissioner Angus Mitchell say staffing levels had emerged as a recurring line of inquiry. That is bureaucratic language for a familiar problem: too much work, too few hands, and a system that appears to rely on overtime, combined duties and people training while still trying to keep traffic moving.

Airservices Australia, which runs the tower, had already modelled elevated fatigue risks for staff at the time of the incidents. The agency’s own planning appears to have anticipated trouble, which is hardly reassuring. Fatigue risk does not automatically mean a controller was exhausted in the moment, but it does mean the safeguards designed to prevent mistakes are now being tested in public.

The incidents themselves are not abstract. On 27 July, a Qantas Boeing 737 was cleared to cross in front of a QantasLink Dash 8, leaving the two aircraft just 120 metres apart. That happened as a controller was handing over to a colleague to take a rest break, one that had been required because the predicted fatigue risk for that shift was high. The event was classified at the most serious safety level, only the third time that rating has been used since Australian records began.

Two weeks later, on 9 August, a Jetstar A320 braked sharply to avoid a Qatar Boeing 777 being towed. A flight attendant fell and fractured her wrist. On the same day, a Qantas Boeing 737 was cleared across a runway in front of a Virgin 737 that had already been cleared for takeoff. Then, on 18 August, a Qantas A321 had to brake when another Qantas Boeing 737 crossed in front of it. The pattern is not subtle, even if the official language tries to be.

Mitchell said Sydney had recorded the highest confliction rate per aircraft movement among major airports in the post-Covid period, about 20% above the national average. He also said ground incidents attributed to air traffic control actions had increased since the pandemic, and that Sydney had twice the annual average number of information and procedural errors seen at other airports.

That matters because Sydney is not a sleepy regional strip where a mistake can be filed under bad luck. It is, as Mitchell noted, the country’s most complex airport. Complexity, however, is not a licence for drift. If anything, it demands more discipline, not less.

Transport Minister Catherine King said she expected Airservices Australia to cooperate fully and fix any problems. She also announced a new independent assurance panel for Sydney air traffic control. The Civil Aviation Safety Authority said none of the incidents posed an immediate safety risk and that air travel in Australia remained safe.

That may be true in the narrow regulatory sense. It is also the sort of sentence that tends to appear before someone decides the system was safer than it felt from the inside. Final reports from the investigations are due in 2027, which gives everyone involved plenty of time to explain why the warning signs were visible before the paperwork caught up.

Written by Christiane Hofreiter christiane.hofreiter@alpineweekly.com